Clean out old rustc compiler intermediates

The CL that splits rust complation and linking into separate actions
is being reverted to save disk space.  Delete the intermediates that
are no longer needed in order to immediately free the disk space.

Bug: 293349612
Test: builds
Change-Id: I1e9f015bf9b6ffe8ba3ccd11ac3075e90640e9b3

CleanSpec.mk

@@ -776,6 +776,9 @@ $(call add-clean-step, rm -rf $(OUT_DIR)/soong/host)
 # Clear out tools/metalava Bazel output dir
 $(call add-clean-step, rm -rf $(OUT_DIR)/bazel/output/execroot/__main__/bazel-out/mixed_builds_product-*/bin/tools/metalava)
 
+# Clear out rustc compiler intermediates after reverting rust compiler/linker split.
+$(call add-clean-step, find $(OUT_DIR) -name "*.rsp.whole.a" -print0 | xargs -0 /bin/bash -c 'rm -f $$$${@}; rm -f $$$${@/.rsp.whole.a/.rsp.a}; rm -f $$$${@/.rsp.whole.a/.rsp}')
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************